...Comes through Pennsylvania this week in a big way and gets started today with visits from two of the frontrunners, Hillary Clinton and John McCain, in Philadelphia and a jaunt to Scranton by Joe Biden. Hillary kicks it off at 2 p.m. at an event at the Philadelphia Sheraton (Same location as Barack Obama's event a month ago. Coincidence?) organized by local attorneys Alan Kessler and Tom Leonard.Kessler, a partner at Wolf, Block, Schorr and Solis-Cohen was a big Al Gore fundraiser and has helped Gov. Ed Rendell raise cash in his election campaigns. We're hearing that Attendes, expected to number about 150, should include Philadelphia mayoral candidates Reps. Robert Brady and Chaka Fattah and Michael Nutter. McCain could well pass Hillary on his way into town. He's scheduled to be at a fundraiser chaired by Blank Rome Chairman David Girard-diCarlo and former Gov. Tom Ridge at the Rittenhouse Hotel. Up in Scranton, Biden, the Delaware Democrat, is scheduled to attend an afternoon fundraiser organized by Todd O'Malley of the law firm O'Malley & Langan. Biden is no stranger to Scranton. He was born there.